Manufacture of glass articles.



E, G sLNG-LUFF.

MANUFA @TUBE OF GLASS ARTICLES.

APPLICATION FILED'DEC. 3, 1907.

SMS

WEZ

WITNESSESI LIQ-W Eliminer-miie, ty of All"- J mf.; e Citizen inv teil or clisinl improve less Articles, olloiringg is e,

Wing of glass7 'l ,l ein enabled to y multE or a regeri ,eteptli non so that the lulling l quentltiesot glass into 31, er other ellzillow receptacles,

prent-ioctl, niej; be oloe nimiurzictuiu, therefore carn inononiieelly and expeeli c? 'betty of glass from i e clmwn? a better and ,et ie e( attained.

drawing glues which heen commercially praclieen drawn 'trom n ntity of clues, about e tlrzmf'inga contained in ln tliis operation, the .Ting is lecllecl from 'the oourerl into the pot. Af-

,en drawn, the cliillecl sposecl ot', which is usually I until it will flow readily, er otherwise electing it in orfiler to clean the latter receiving' e charge tor :iu-

neen proposed to draw glass ccvnpszrutively shallow pool i li is pern'uttecl to How inuit, rnmisrevnitrn, essonon ro rtrrsemieef.

if, e cone L e. .fleep 'iocly of glass .1min-'twine l it@ u .13.. .LA C,

RATGN Gli' PENNSYLVANIA,

CEURE l? GLASS ARTICLES.

Patented llllny 2li, it@

:L tiled. @member 3, 1907. Serial No. 404,931.

wherein the glass articles are drawn rom tliecleep body of molten metal in the tan.; itself, such heated-body? by reason ont its greet mass and internal high temperature, substantially maintains itselt' in the proper condition, auxiliary heating devices being preferably employed locally above, the suriuce of the glass, for the purpose oi" assist ing in 'the regulation oit the temperature oi the immediate surface at any point, as may be found desirable.

lln the accompanying drawings l have illustrated u glass-melting 'furnace or tank suitable for the practice of the invention Figure l is an irregular horizontal seetiogn of a. portion of such e furnace on the line l-L Fig. 2; Figure 2 is e transverseyertical section on the line ll-U. TEig. Figure 3 is .longitudinal vertical section on the line lll- HL Fig. l, showing sundry of the partsin one position, and Figure t is e similar section on the line lV-l/v, Fin: l, showin inl the parts in another position; Figure 5 is :L plan View showing i modification, und Figures G :incl T are sectie-nel `vietv's on 'the line lll-Vl of Fig. 5, showing tlie parte in different positions; Figure S is n 'View simi*- lar to Fig. G showing e further n'mclicution.

The body ot' glass in the usual melting-end 2 of the large furnace or tank l, is melte :mit umintnined in molten condition oy lient generated and applied in any suitable wey. :is ior instance, by the Well-known system ot fiues nml regenerntors for gas and air ranged in the customary manner et theopposite sides ot the furnace., not` shown. )it the ront ot the meltiug-en l the root ot the furnace is cut away, and the Wall extends downu'urtlly preferably below the surtace ot the glues, being supported upon pmi estals et, with intervening arches; 5, forming; n series of Wide o enings 6 in the Wall 3 below the surtur'e o the glass, through which the molten metal freely Hows into the dran'- iug-eucl l', which preferulily extends entirely u cross the front of the furnace.

Pedestnls 8 are preferably arranged on op posit@ sides ot' the drawing end 7 in pairs in line with the peflestals 4l, between which are built tlie transverse arches below the level et' 2; @sasso at intervals along the drawing-end. Thinproject above the surface of the glass, thus dividing the upperfportion et the drawingend into a series of surface compartments, While the body below, by means of the wide openings 10,'ior1ns a unitary reservoir open `from end to end, which has t'rce communication with the melting-end 2 of the furnace through the wide openings G. The numeral 12 indicates the front wall oi the furnace.

Along` the outer wall .l preferably arrange small heating-chambers 13 above the surface ot the glass in each compartment.

The side-walls 14 of these local heatingchanibers are supported upon the outer row oi pedestals 8, and their inner walls 15 torni curtains extending down near to, but preferably not below, the surface ol the The walls 15 may however, it' desired, be n iade to project below the surtace ot' the glass. Burners 16 for the introduction of gaseous fuel are arranged in anydesired number and location in the walls oi' the heating-chambers.

ily means ot the heating-chambers 13 l ani enabled to accurately regulate the teinperature ot the immediate surface ol the glass, since the burners 16, or any of them, may be turned olll or on, or adjusted, at will.

l have found the use ot' these local heating-chambers to be ot particular advantage along the outside wall l2, where there is sonie tendency ot the to chill, and for this reason l also preferably place similar chan'ibers 17 on the walls 1S ot' the drawing'- end, (only one end beini` shown in the drawings).A

l have also shown in the drawings a series of like heating-'chambers lt) arranged along the inner line of the compartments over the surface of the glass -abovc the respective openings G. Y I

AThese local lieaeni-chainhers may however be arranged at any desired point or points, or in some cases may he omitted altolefether, since Iv have intended to illustrate in thc drawings merely an arrangen'ient which has been found to give very satisfactory results.

.ln `the surface of the glass in the center o'l1 each compartment l place a ring Q() ot' refractory inateriah'which projects sligrlitly above the surface of the glass. 'lliis ringn may be made to lloat, but l prefer to malte it ot such weight that its opposite` edges may rest uponv ledges 2l which are preferably made to project for that purpose from the arches 9.

The trings 20 are employed to segregate, without: separating, the innncdiate vportieri of the surface oi the rglass from which the articles are drawn. troni the large bodyc'f glass in the drawing-end. The surface within the ring is kept tree of any floating inai purities, and its temperature can accurately regulated and controlled. The ring also, in conjunction with the other members with which it is combined, performs the important function to be hereinafter mentioned, ot properly directing the heat oi the furnace upon and around the surface of the article being drawn, in order to prevent a too faster abrupt chilling of the latter. Above the exposed surface 'of the outside ci the ring; in each. compartmenti suspended the vertically-movable topstone v22, which is provided with a central opening 23 which is preferably olf a diameter slightly greater than the outside diameter of that portion of the ring which projects above the surface ot' the glass. The top-v stone is suspended by any suitable means, as by chains 24 attaehedto eye-bolts 25 on opposite sides of the top-stone, and eeni i nected to any 'suitable means for alternately i raising the top-stone to the position shown in Figure 3, and lowering it to the position shown in Figure Il, slightly above the surface ot the glass. A cover 26 is Provided for the opening in, the top-stone when the latter is in its elevated position. Willian in elevated position the top-stone and cover serve to retiect the heat of the 'body of the glass. and that from the local heating-chainwithin the ring, so as to bring it to the desired uniform temperature. When the top'- p stone is lowered and tliecover removed, the surface of the glass within the ring is exposed to the unimpeded coolin action of the atmosphere, and is there y lslightly chilled to the condition bestadaptetl for the fcrniation of the article to be drawn. During the drawing of the article7 sce Figure el, the top-stone and the ring, acting in conjunction, serve to direct the heat of the urnace upwardly around the article. This has been found to be very beneiicial, since otherwise the article will often chill too quickly or abruptly, and break; while by subyecting the article to the heat permitted to escape 'from the furnace, it is allowed to cool more gradually and is somewhat annealed during the drawingr operation.

ln Figure l I have shown the lower portion olf a cylinder being' drawn from the ,class vwithin the ring, it being understood that any suitable drawing mechanism may be employed, the drawing beingy performed bv the usual or any desired form olr'bait, and air or other tluid supplied to the article through the bait or in any other suitable way. ln drawing; articles of other forni. such as a sheet, the opening` in the top-stone and the-ring will be modified accordingly.

ln,Figures 5, (3 and T l have illustrated drawintwhanibers arranged along the Wall hers, directly upon the surface ott the glass what` may be. one ot a series of separate.

w more r iin Cit

eseeeo ol? the ineltiinr-end in any desired manner, and in open communication with the body ol the -inolten glass in the melting-end, the forni and arrangement of the parts being' otherwise s-:ubstaiitially the saine as has been already described Figure t5 is a View similar to Figure G illustrating a further nuiditicution, in which the lmrners in the inner local heatin' ber or ciuunhers lf) are dispensed with, and an opening' or openings cut through the wall ot the melting-end, so that the heat troni vthe ineltiinI-Aend may be used instead ot the burners. Means, such as the vertically sliding valve or damper 28, are provided 'tor clos to; the opening` 2l' when the top-stone is lowered, so as to eut oitthe supply ot heat iliroin the inciting-end duringv the drawing' operation. Or the damper 28inay he omitted'. and the edge of the top-stone. (proyidcd with the iunrardly'projeeting pluie 2) it necessary), will serve the saine end.

vSince the present invention resides in the method of manufacture hereinafter seti forth in the clainis, other modilimitions in the turuace `drin-ture and apparatus may be made without departure from the scope tl'iereo't, and it may also be practiced in the employinent ot other and different lorins of 't'urH nace and apparatus. rEhe furnace herein shown and described is made the suhjeet ot a separate application for Letterslatent.

ln order to attain the hest results the niolten glass in the liurnace should be .niain- 'tained at a Substantially constant depth and surface level,

In the practice of the invention in connection with, the furnace shown and. described, the top-stone being` in the elevated position shown Vin Figure El, and its central opening closed by the cover, the surface ot' the glass which is segren'ateii Within the ring is l fate ed uniiiioriuly to the desired ien'iperature by the internal heat of the body oit `-(glass itself, and the heat reticoli-d downwardly from the tcu'rstone and cover.

who topestone is then lowered to the posi-- tion shown in Figure #i and the cover reinovcd. and thc surface of the ,frlass wit'hi the rino' thus exposed to the uniinpedeifi cooling etion ot the atmosphere. The sur- 'liare oi the lglass is thereby chilled suiliricutiy to l'orin a tihn or skin ot thc teniperature which, as is woll known, best, adapted (o thc 'l'oriuatitm otw 'the article to he drawn.

li'canwhile the hait has been lowered, und the surface ot' the glass beine` now in proper condition1 and iu adhering roulent with the haii', the article drawn upwardl" iiroin the njlass within the ring' in the urli-known manner.

are beirut dfawn` has been reached,

' cle is severed troni i l i the hath in any desired way, a .number of which are now well known. To this end l prefer to discontinue the drziwing' and elevate the top-stone, when the lower end oit" the article will be quickly melted away.

rlhe article is then removed, the cover replaced over the opening` in the top-stone, and the surface ot ,he 2@glass within the ring relic-ated as heitere.

ln the arrangement shown in Fiennes l antL a nuinher of articles may be drawn sininltaneously, or they may be drawn from the conipartn'ients of the drawingend in any desired order or sequence.

i elaiin as my invention:

l. r`The method of manufacture of glass articles by drawingl tronra deep body of molten glass, which consists in segregating a portion ot the sui-tace of the glass without deiaching it from the body beneath, heating said segregated portion 'to a temperature above that required for drawing, cooling said segregated portion by exposure to the :itiuospliere to a` proper temperature for drawing, and then drawing the article up wardly therefrom.

2. The method oli nninufacture of glass articles by drawing; from a deep body of molten glass, which consists in segregating,` a portion oli' the surface of the glass without dctaeuing it troni the body beneath7 heating said segregated portion to ay temperature above that required for drawing, then coolin ul it to the desired consistency for drawing, and then drawing,` the article upwardly therefrom. i

Il. The method of manufacture of glass' articles by drawing from a deep body of molten 1-lass, which consists in segregating a portion ot the surface or' the glass without deituzhing it troni the body beneath., drawing a succession o articles t'roiu said segre- `ated portion, tirsty reheating to a' temperan ture above that required for drawing` and then cooling;v said segregated portion to a proper temperature lor (,lrawinpv by exposure to the atmosphere after the drawing of each article, and' maintaining the body of inolten glass ata substantially constant depth throughout the operation.

et. The uic hod ot manufacture of glass articles by drawing' t'roiu a deep body of molten 2ultras which consists in segregatting a portion of the surface of the glass without detacuing; it 'from the body beneath, drawiur' a `glass article upwardly from said seg'- rer'ated portion, and directingthe heat of the glass outside ot said segregated portion upwardly into contact with the article dururn' the drawing; operation.

5S. rlhc method ot manufacture of glass articles by drawinfl troni a deep body of niolten glass, which consists in segregating a portion ot' the surface of the glass without Ceachinl it. from the hod'y beneath, applyo Contact. with the a'cle durg the Siae 0i' said. 

